Carton with handle and pouring spout



March 30, 1965 E. BUMP CARTON WITH HANDLE AND POURING SPOUT 3Sheets-Sheet 1 Filed Feb. 20, 1964 n la R P m M m U v B m L D m W D E hma mm on a 9% Q ATTORNEY March 30, 1965 E. L. BUMP 3,175,750

CARTON WITH HANDLE AND POURING SPOUT Filed Feb. 20, 1964 3 Sheets-Sheet2 INVENTOR. EDWARD L. BUMP ATTORNEY March 30, 1965 E. L. BUMP CARTONWITH HANDLE AND POURING SPOUT 3 Sheets-Sheet 3 Filed Feb. 26; 1964INVENTOR. EDWARD L.BUMP

ATTORNEY 3,175,750 IARTON WHH HANDLE AND POURENG SPOUT Edward L. Bump,Madison, Wis, msignor to Industrial Research and Development Corp,Madison, Wis., a corporation of Wisconsin Filled Feb. 25), 1964, Ser.No. 346,189 14 Claims. (til. 229-47) My invention relates in general tocartons made from blanks of sheet material, and more particularly tocartons for liquids and other flowable' materials which have handles forcarrying and pouring, and pour spouts.

The use of cartons made from coated paper products as containers anddispensers has become widespread in recent years, especially, but notexclusively, in connection with various liquid dairy products. However,in spite of their widespread acceptance, such caitons as have eX- istedprior to my present invention have all been subject to one or moredisadvantages. Specifically, such disadvantages include lack of acarrying and pouring handle, top construction which is difiicult to openand close, pouring spouts which do not efiectively limit the flow ofliquid from the carton, complex construction which is diiiicult andexpensive to construct and/or which requires excessive material, andother related shortcomings.

Accordingly, it is a primary object of my invention to provide asingle-piece carton which has a spout that discharges the contents ofthe carton in an easily controlled, smooth fiow.

It is a further object of my invention to provide such a carton whichhas a handle that may be used both for carrying the carton and pouringits contents.

It is a still further object of my invention to provide a carton havinga handle and a limiting pouring spout which is easily and inexpensivelymanufactured and constructed from a minimum of sheeting material.

It is another object of my invention to provide such a carton which hasan improved bottom construction that efiiciently closes the bottom ofthe carton.

It is an additional object of my invention to provide such a cartonwhich may be constructed from a variety of sheet materials. 7

Other objects and advantages of my invention will be apparent from thefollowing description, taken in conjunction with the accompanyingdrawings, wherein a pre ferred embodiment of the principles of myinvention has been selected for exemplification.

In the drawings: 7

FIG. 1 is a plan view of a blank of sheeting material from which mynovel carton is made.

FIG. 2 is a perspective view of my carton as it is originally sealed.

FIG. 3 is a perspective view of my carton when .it is unsealed and thespout is closed.

FIG. 4 is a perspective view of my carton with the spout open forpouring.

FIG. 5 is a perspective view of the bottom of my carton with its bottomflaps partially folded to the position in which they close the bottom ofthe carton.

FIG. 6 is a perspective view of my carton in a partially assembledcondition.

FIG. 7 is a top view of my carton in a partially sealed condition inwhich it is easily filled.

Referring more particularly to the drawings, in which like numeralsrefer to like parts, my novel carton 10 might typically be constructedfrom plastic coated paper or cardboard for use as a container for milkor some other pourable liquid or dry material. Preferably made from asingle piece of material, the carton it) has four walls 11, 12, 13 and14, a pour spout 15 located at the corner defined by the walls 11 and14, and a handle 16 sing-1n Patented Mar. 30, 1965 usable both forcarrying and pouring. The handle 16 extends diagonally from the cornerdefined by the walls 12 and 13 toward the corner forming the pour spout15. The carton 10 may have either a square or rectangular cross-section.For illustrative purposes only, a carton with a square cross-section isshown in the drawings.

A blank 17 from which the carton 10 may be made is shown in FIG. 1. Theblank 17 has a top section 18, a wall section 19 and a bottom section20. A lateral crease 21 separates the top section 18 and the wallsection 19, a lateral crease 22 separates the wall section 19 and thebottom section 20. The lateral creases 21 and 22 are substantiallyparallel and run the entire width of the blank 17.

Four wall creases 23, 24, 25 and 26 divide the wall section 19 into anattachment flap 27a and the four walls 11, 12, 13 and 14. The wallcreases 23, 24, 25 and 26 are substantially parallel, and aresubstantially perpen dicular to the lateral creases 21 and 22. Themiddle wall crease 25 and the outer left wall crease 23 run the entireheight of the blank 17, while the inner left Wall crease 24 and theright wall crease 26 run from the bottom of the blank 17 to the lateralcrease 21. A top crease 27 slightly inclined toward the outer left wallcrease 23 runs from approximately the intersection of the inner leftwall crease 24 and the lateral crease 21 to the top of the blank 17. Asimilar top crease 28 slightly inclined toward the right edge 29 of theblank 17 runs from approximately the intersection of the lateral crease21 and the right wall crease 26 to the top of the blank 17. The middlewall crease 25, the left outer wall crease 23 and the top creases 27 and28 divide the top section 18 into four top panels 30, 31, 32 and 33. Thewall creases 23, 24, 25 and 26 divide the bottom section 20 into bottomflaps 34, 35, 36 and 37.

The top panels and 33, which are substantially mirror images of eachother, are positioned adjacent to each other when the carton 10 isassembled. The top panel 30 has a triangular section 38 and a handleflap 39. The top panel 33 has a corresponding triangular section and acorresponding handle flap 41.

Both triangular sections 38 and 40 are approximately the'same shape. Oneleg of the triangular section 38 is formed by the lateral crease 21, thesecond leg is formed by the top crease 27, and the third leg is formedby a crease 42 which separates the triangular section 38 and the handleflap 39. One leg of the triangular section 40 is also formed by thelateral crease 21, the second leg is formed by the top crease 28;, andthe third leg is formed by a crease 42 which separates the triangularsection 40 and the handle flap 41.

The handle flaps 39 and 41 have corresponding finger openings 44. Fingertabs and 46 preferably project into thefinger openings 44 to makegripping of the handle flaps 39 and 41 easier. The finger tabs 45 and 46are toldable along creases 47 and 48 to provide a support surface forthe fingers. Two creases 49 and 56 extend from a common point on thecrease 42 in the handle flap 39 slightly to the rear of the fingeropening 44. Corresponding creases 51 and 52 extend from a common pointon the crease 42 in the handle flap 41 slightly to the rear of thefinger opening 44. These creases 49, 50, 51 and 52 facilitate thefilling of my novel carton 10, as will be described more fully as thedescription progresses.

Like the top panels 30 and 33, the top panels 31 and 32 are adjacenteach other in the assembled carton 10 and are substantially mirrorimages of each other. The top panel 31 is divided by inclined creases53, 54 and 55 into four generally wedge-shaped sections 56, 57, 58 and59 which lie side by side like sectors of a circle. Similarly, the toppanel 32 is divided by inclined creases 60, 61

and 62 into four corresponding wedge-shaped sections 63, 64, 65 and '66.The inclined creases 53, 54 and 55 extend from the intersection of thewall crease 24 and the lateral crease 21 to the top of the blank 17,while the inclined creases 60, 61 and 62 extend from the intersection ofthe wall crease 26 and the lateral crease 21 to the top of the blank 17.

Spout sections 59a and 66a project, respectively, from the correspondingwedge-shaped sections 59 and 66 to form the spout 15 for my improvedcarton 16. The spout sections 59a and 66a are jointed at the middle Wallcrease 25. Each of the wedge-shaped sections 59 and 66 has a portion ofthe lateral crease 21 as one of its sides. A protective lip '67 projectsfrom each of the spout sections 59:; and 66a. A perforated line 68 lyingsubstantially parallel to the top of the lip 67 separates the lip 67from the spout sections and 6601, allowing the lip 67 to be easilydetached from them. The spout section 59a is separated from thewedge-shaped section 59 by a spout crease 69:: which runs from the leftend 68a of the scored line 68 to the lateral crease 21, crossing themiddle wall crease 25 a suitable distance from the crease 21. The spoutsection 66a is separated from the wedge-shaped section 66 by acorresponding spout crease 6912 which runs from the right end 68b of thescored line 68 to the lateral crease 21, intersecting the spout crease69:: approximately at the middle wall crease 25.

The corresponding wedge-shaped folding sections 58 and 65 are locatedadjacent to the wedge-shaped sections 59 and 66. In the assembled cartonthe folding section 58 extends between the triangular section 38 and thewedge-shaped section 59, while the folding section 65 extends betweenthe triangular section 46 and the wedge-shaped section 66. Substantiallytriangular sealing flaps 70 project from each of the folding sections 58and 65. The sealing flaps 70 are separated from the remainder of thefolding sections 58 and 65 by the creases 71. As shown in the drawings,it is preferable that the sealing flaps 70 should not extend to thelateral creases 55 and 62, so that a space 76a is provided between eachsealing flap 7t) and the protective lip 67. Such openings 70a facilitatefolding of the folding sections 58 and '65 with respect to wedge-shapedsections 59 and 66 respectively, along creases 55 and 62. v Theremaining wedge-shaped sections are the connecting sections 56, 57, 63and 64. The vertex angles of each of the connecting sections 56, 57, 63and 64 are substantially equal. Handle engaging tabs 72 project from theblunt end of the connecting sections 57 and 64. Creases 74 separate thehandle engaging tabs 72 from the remainder of the connecting sections 57and 64. Creases 74 preferably extend beyond the creases 54 and 61separating connecting sections 57 and 58, and 64 and 65, respectively tofurther separate the handle engaging tabs 72 and the sealing flaps 70,as shown. Small, approximately triangular areas 73, preferably liebetween creases 54 and 74, and between creases 61 and 74.

Looking at the bottom section of blank 17 in FIG. 1, the inner flaps 34and 36 are the first to be folded in assembling the bottom of the carton10. The outer bottom flaps and 37 are folded over the inner flaps 34 and36. The outer flaps 35 and 37 extend from opposite walls of theassembled carton 10, as do the inner flaps 34 and 36.

The outer flaps 35 and 37 are approximately rectangular, and aresufliciently large to cover and seal the bottom of the carton 10.Preferably, the outer corners 87 and 88 of the outer flap are beveled.The inner flap 34 has a pair of substantially congruent triangularportions 75 and 76. The preferably identical inner flap 36 has a pair ofcorresponding triangular portions 77 and 78.

The triangular portion 75 is outlined by the wall crease 23, a foldingcrease 79 extending from the intersection of the wall crease 23 and thelateral crease 22, and an edge 33 extending from the bottom end of thewall crease 23 to the point where the triangular portion intersects thefolding crease 79. The triangular portion 76 is outlined by the wallcrease 24, a folding crease 31 extending from the intersection of thewall crease 24 and the lateral crease 22, and an edge 82 extending fromthe bottom end of the wall crease 24 to the point where the triangularportion 76 intersects the folding crease 81. The triangular portion 77is outlined by the wall crease 25, a folding crease 83 extending fromthe intersection of the wall crease 25 and the lateral crease 22, and anedge 84 extending from the bottom end of the wall crease 25 to the pointwhere the triangular portion 77 intersects the folding crease 83. Thetriangular portion 78 is outlined by the wall crease 26, a foldingcrease extending from the intersection of the wall crease 26 and thelateral crease 22, and an edge 86 extending from the bottom end of thewall crease 26 to the point where the triangular portion 73 intersectsthe folding crease 85.

Preferably the triangular portions 75, 76, 77 and 78 are isosceles, withedges 86, 82, 84 and 36 and the edges along the folding creases 79, 81,83 and 85 being equal. As illustrated, the outer corners of the innerflap 34 adjacent the edges 86 and 82 are preferably cut away to define atongue 89. The outer corners of the inner flap 36 are similarly cut awayto define a tongue 90. The tongues 89 and 96 are sufiiciently large tooverlap and be secured to each other in the assembled carton 16.

Assembly The first step in the assembly of my carton Iii is to cut andcrease a blank 17 of sheeting material as shown in FIG. 1. Next, theblank 17 is folded in half about the middle wall crease 25 to bring theleft outer wall crease 23 and the right edge 29 together. The attachmentflap 27a is then secured to the top panel 33, the wall 13 and the bottomflap 37 along the right edge 29, preferably on the inside of the carton10. If the sheeting material from which the blank 17 is cut is plasticcoated paper or all plastic, the flap 27a and all other mating surfacesmay be secured by heat sealing. If some other material is used, the flap27a may be secured with glue or other similar conventional means. Theblank 17 is then squared.

The manner in which the bottom flaps close the bottom of the corton 19is best shown in FIG. 5. Together, the inner flaps 34 and 36 are foldedinward toward each other. The folding occurs at the lateral crease 22,and the folding creases 7), 81, 83 and 85. As the inner flaps and 36 arefolded toward each other they pull the outer flaps 35 and 37 inwardtoward each other. The inwardly collapsing triangular portions 81 and 83and outer flap 35, define an envelope into which the free end of outerflap 37 is adapted to slide. Entry of the outer flap 37 into theenvelope is facilitated by the beveled outer corners 87 and 83 of theouter flap 35. The overlapping portions of the outer flaps 35 and 37,the overlapping portions of the inner flaps 34 and 36, and all otherrequired surfaces are then apppropriately sealed as indicated above.

The initial steps in assembling the top of the carton 16 are suggestedby FIG. 6. First, the connecting flap 63 is folded about the inclinedcreases 28 and 66 over the connecting section 64, thereby matching thetop crease 28 and the inclined crease 61. Similarly, the connectingsection 56 is folded about the inclined creases 27 and 53 over theconnecting section 57, thereby matching the top crease 27 and theinclined crease 54. Both of these foldings are accomplishedsubstantially simultaneously by folding the triangular sections 38 and40 toward each other. The triangular section 33 folds at the top crease27 and the lateral crease 21; the triangular section 46 folds at the topcrease 23 and the lateral crease 21. This folding laps the triangularsection 38 over the now matching connecting sections 56 and 57, and lapsthe triangular section 40 over the now matching connecting sections 63and 64. At this time the connecting section 56 is suitably sealed toconnecting section 57 and to the underside of the triangular section 38,and the connecting section 63 is sealed to connecting section 64 and tothe underside of the triangular section iii. The handle engaging tabs 72are then sealed to the inside of the handle flaps 39 and 41 after whichthe top of the carton 15 appears substantially as shown in FIG. 7.

The carton is most easily filled in the partially sealed conditionillustrated in FIG. 7. A substantial opening to the carton 10 is exposedby spreading apart the handle flaps 39 and 11. The spreading is madeeasy by the creases 49, 50, 51 and 52. Those creases are located at therear of the handle flaps 39 and 41, just above where the top attachmentflap 27a is attached to the inner surface of flap 41. When spread apart,the handle flaps 39 and 41 fold outward at the creases 55 and 52, andupward again at creases 49 and 51. The opening at the spout and betweenthe spread handle flaps 3? and 41 is sufficiently large to permit rapidfilling'of the carton 15.

After the carton 10 has been filled, sealing of the top of the corton11) is completed. The handle flaps 3? and 41 are first-'pressedagainsteach other to match the flaps 39 and 41 and thet handle engaging tabs72. The tabs 72 and the matching portions of the handle flaps 39 and 61are then suitably secured together in the manner indicated above.

The spout 15 and lip 67 are then sealed against the handle 16 in theposition shown in FIG. 2 as follows: The folding sections 58 and 65 arefolded about the inclined creases 55 and 62 and against the innersurface of the widge-shaped sections 59 and 66, respectively. Theposition of the carton 19 after such folding is Substantially as shownin FIG. 3, except that the lip 67 is still attached to the spout 15,rather than the handle flaps 39 and 41, as shown. The folding sections58 and 65 are of such size, and the handle flaps 39 and 41 are of suchlength along the creases 42 and 43 that the lower front corner 91 of thehandle 16 presses the sealing flaps 70 against the spout 15 atapproximately the intersection of the spout creases 65a and 6912. Thus,the triangular sections 38 and 40 are not parallel to the bottom of thesealed carton 15, but are inclined slightly upward from lateral crease21 to the intersection of spout creases 69a and 65b. The spout 15 andthe sealing flaps 70, which are folded and sealed against the innersurface of the spout 15 are now folded against and sealed to the handle16 in the position shown in FIG. 2. The folding occurs along the spoutcreases an and 69b, and the creases 71, 54 and 61 and 21. The protectivelip 67 detachably secured to the spout 15 is also sealed to the handle16 as shown. If the carton 15 is properly sealed as described above, theseal will be hermetic.

The important function of the folding sections 58 and 65 in opening andclosing the spout 15 may now be more fully described. The inclinedcreases 54 and 61 bordering the folding sections 58 and 65 arerespectively pivotally secured to the inclined creases 27 and 28bordering the trianguler sections 38 and 40. Inclined creases 55 and 62likewise pivotally join the folding sections 58 and 65 to thewedge-shaped sections 59 and 66, respectively. Thus, folding sections 58and 65 in effect pivotally link the triangular sections 38 and 40 to thewedge-shaped sections 59 and 66.

When the handle 16 is in its lower position shown in FIGS. 2 and 3, theinner surfaces of the folding sections 58 and 65 are folded against theinner surfaces of the wedge-shaped sections 59 and 66, and the spout 15is closed. When the handle 16 is raised to its upper position, shown inFIG. 4, the folding sections 58 and 65 are eX- tended upwardly from thewedge shaped sections 59 and 66, thereby supporting the triangularsections 38 and 40 in an inclined position, and opening the spout 15.When the handle 16 and folding sections 53 and 65 are moved 5 back andforth between their upper and lower positions, folding occurs at thelateral crease 21, the creases 42 and 43, and the inclined creases 54,55, 61 and 62.

Use of my carton 10 is convenient and simple. The seal holding the spout15 against the handle 16 is first broken. This is easily done byinserting the thumbs under the downwardly facing folding sections 58 and65 and applying an upward pressure. As the folding sections 58 and 65are moved upward by the pressure of the thumbs, the spout 15 and thesealing flaps sealed thereto are pulled away from the handle 16 to theposition of P16. 3. As the spout 15 is pulled away from the handle 16,it detaches itself from the protective lip 67 along the perforated line68, leaving the lip 67 secured to the handle 16. To insure that the lip67 does remain on the handle 16, the seal between the lip 67 and thehandle 16 must be stronger than the perforated connection be tween thelip 67 and the spout 15. The protective lip 67 insures a sanitary spoutby protecting the pouring lip of the spout 15 from dirt or othercontamination prior to use.

Once the spout 15 is unsealed, the person pulls the handle 16 upwardlyto its upward position thereby pulling the sealing flaps 76 away fromthe inside surfaces. of the spout 15 and opening the spout 15 forpouring, as shown in FIG. 4. After pouring the desired arnount, theperson pushes down on the handle 16 to place the spout 15 in the closedposition of FIG. 3. In that position the carton 10 will be closed andits contents protected.

The advantages of my novel carton 10 are now quite obvious. Its diagonalhandle 16 may be used bothfor carrying and pouring. The corner-pourspout 15 is carefully designed to have an opening of limited size thatreduces the possibility of spilling or over-pouring. Furthermore, itsdesign utilizes the normal corner construction of the carton as an aidin pouring, thus eliminating a need for special spouts to be constructedon the sides of the carton as commonly required with prior cartonconstruction. The design of the blank 17 is such that the blank 17 maybe made of sheet plastic or other synthetic sheeting material, as wellas coated or uncoated paper and cardboard.

It is understood that my invention is not confined to the particularconstruction and arrangement of parts illustrated and described, butembraces all such modified forms thereof as come within the scope of thefollowing claims.

I claim:

1. A carton for fiowable materials comprising:

(a) a bottom,

(5) a first, a second, a third and a fourth wall, said first and fourthwalls being substantially parallel, and said second and third wallsbeing substantially parallel,

(c) first and second wedge-shaped sections projecting upwardly from saidfirst and second walls, respectively,

(a') a pair of spout sections projecting from said wedge-shaped sectionsand being joined to define a spout extending from the corner of saidcarton formed by said first and second walls,

(2) a first folding section pivotally connected to said firstwedge-shaped section and a second folding se tion pivotally connected tosaid second wedgeshaped section,

(7'') a first triangular section pivotally connected to the top of saidthird wall and to said first folding sec tion, and a second triangularsection pivotally connected to the top of said fourth wall and to saidsecond folding section, said first and second triangular sections havingmating diagonal edges,

(g) corresponding handle flaps projecting from said diagonal edges ofsaid triangular sections, said handle flaps being secured to each otherto form a handle for said carton,

(it) said handle and said triangular sections having an upper positionwherein said folding sections extend upwardly from said wedge-shapedsections to open said spout and a lower position wherein said triangularsections cover the top of said carton and said folding sections arefolded downwardly against said wedge-shaped sections to substantiallyclose said spout.

2. The invention described in claim 1 wherein a sealing means projectsfrom each of said folding sections, said sealing means being adapted tolimit the opening of the spout when the handle is in its upper position,and to press against the spout sections to substantially seal said spoutwhen said handle is in its lower position.

3. The invention described in claim 2 wherein the handle and thetriangular sections extend substantially to the spout when in theirlower position to force the folding: sections and the sealing meansagainst the wedge-shaped sections and spout sections and close saidspout.

4. The invention described in claim 2 wherein a protective lip: isdetachably secured to the top edge of the spout, and wherein the cartonis in its originally sealed condition, the handle and the triangularsection being in their lower position, and the spout, the sealing meansand the protective lip being secured to said handle in substantiallyfluid-tight relation.

5. The invention described in claim 4 wherein the sealing means isadditionally secured to the spout in substantially fluid-tight relation.

6. The invention described in claim 4 wherein the wedge-shaped sectionsand the folding sections are pivoted toward the handle where the spoutand the sealing means are secured to said handle, and wherein the sealedcarton can be opened by lifting upwardly on the downwardly facingfolding sections to separate the spout and the sealing means from thehandle and detach the spout from the protective lip, and lifting thehandle and attached triangular sections to their upper positions toseparate the sealing means from the spout.

7. A carton for tlowable materials comprising:

(a) a bottom section,

(b) a first wall, a second wall, a third wall and a fourth wall, saidfirst and fourth walls and said second and third walls being parallel,

(c) a first triangular section pivotally connected to the top of saidthird wall and a second triangular section pivotally connected to thetop of said fourth wall, said triangular sections having mating diagonaledges extending from the corner of the carton formed by said third andfourth walls substantially to the corner of the carton formed by saidfirst and second walls,

(d) corresponding handle flaps projecting from said triangular sectiondiagonal edges and being secured to each other to form a diagonal handlefor said carton,

(e) first and second wedge-shaped sections projecting from said firstand second walls, respectively,

(1) a pair of spout sections projecting from said wedgeshaped sectionsand being joined to define a spout extending from said corner of saidcarton formed by said first and second walls,

(g) a first folding section pivotally connected to said firstwedge-shaped section and to said first triangular section,

(h) a second folding section pivotally connected to said secondwedge-shaped section and to said second triangular section,

(i) sealing means projecting from each of said folding sections,

(j) said folding sections being folded against said wedge-shapedsections and said sealing means being sealed to said spout influid-tight relation to close said spout,

(k) said wedge-shaped sections and said folding sections being foldedtoward said handle and said spout said sealing means being sealed tosaid handle in fluid-tight relation to close said carton,

(I) said carton being adapted to be unsealed by lifting upwardly on saidfolding sections to pivot said wedge-shaped sections and said foldingsections outwardly from said handle and break the seal between saidhandle and said spout and sealing means, and by lifting upwardly on saidhandle and attached triangular sections to pivot said folding sectionsupwardly from said spout sections and break the seal between saidsealing means and said spout to open said spout,

(m) said handle, said triangular sections, said folding sections andsaid sealing means being movable when said carton is unsealed between anupper position wherein said spout is open and a lower position whereinsaid sealing means are pressed against said spout to susbtantially closesaid spout.

8. The invention described in claim 7 wherein a protective lip isdetachably secured to the top edge of said spout, said protective lipbeing sealed to said handle and being adapted to be detached from saidspout and remain sealed to said handle when said carton is unsealed.

9. The invention described in claim 7 wherein the carton has creasesbetween said Wedge-shaped sections and said walls, between saidtriangular sections and said walls, between said wedge-shaped sectionsand said folding sections, between said folding sections and saidsealing means, and across said spout to facilitate folding of saidcarton in its sealed and unsealed positions.

10. The invention described in claim 7 wherein:

(a) each pair of adjacent folding sections and triangular sections areconnected in pivotable relation by means of first and second connectingsections,

(b) each of said first connecting sections having a side secured to aside of one of said triangular sections,

(0) each of said second connecting sections having a side secured to aside of one of said folding sections,

(d) said first and second connecting sections being folded and securedtogether to connect said triangul ar sections and said folding sectionsin abutting relation.

11. The carton of claim 7 wherein said bottom comprises:

(a) a first, substantially rectangular, outer fiap pivotallllyprojecting from the bottom of said second wa (b) a second, substantiallyrectangular, outer flap pivvotally projecting from the bottom of saidthird wall,

(0) a first inner flap pivotally projecting from the bottom of saidfirst wall and having its side edges pivotally attached to said firstand second outer flaps,

(d) a second inner flap pivotally projecting from the bottom of saidfourth wall and having its side edges pivotally attached to said firstand second outer flaps,

(e) each of said inner flaps having a pair of triangular portions, eachof said triangular portions being defined by a side edge of the innerflap, a crease running from the inner end of the side edge, and a notchrunning from the outer end of the side edge,

(f) said first and second outer flaps being sealed to each other inoverlapping relation.

12. The invention described in claim 11 wherein said second outer flapprojects into the envelope formed by said first outer fiap and thetriangular portions pivotally attached thereto.

13. A single-piece blank for a four-walled carton, said blankcomprising:

(a) a top section, a bottom section and a wall section,

(b) a first crease dividing said top section from said wall section, anda second crease dividing said wall section from said bottom section andbeing substan- 9 tially parallel to said first crease, said first andsecond creases extending for the full length of said blank,

() a left Wall crease, a middle wall crease and a right Wall creasedividing said wall section into four Walls, said Wall creases beingsubstantially perpendicular to said first crease and extending for thefull height of said blank.

(d) said three wall creases dividing said bottom section into a first, asecond, a third and a fourth bottom flap adapted to form the bottom ofthe carton, and dividing said top section into a first, a second, athird and a fourth top panel adapted to form the top of the carton, saidfirst and second top panels and said third and fourth top panels to beadjacent in the completed carton,

(2) said third and fourth top panels having corresponding triangularsections and handle flaps,

(f) each of said triangular sections having one side formed by saidfirst crease, a second side formed by a wall crease, and a diagonalside,

(g) a pair of corresponding handle flaps extending from said diagonalsides in pivotable relation and being adapted to be secured together toform a handle for the completed cart-on,

(h) said first and second top panels each being divided by threeinclined creases into corresponding first, second, third and fourthwedge-shaped sections, each of said first Wedge-shaped sections havingone side formed by a wall crease forming one side of a triangularsection, and each of said fourth wedgeshaped sections having one sideformed by a part of said first crease,

(i) spout sections projecting from said fourth wedgeshaped sections ofsaid first and second top panels and being secured together along themiddle wall crease separating said first and second Walls to define aspout for the completed carton,

(i) said third wedge-shaped sections being folding sections adapted tomovable link said fourth wedgeshaped sections and said triangularsections,

(k) said first and second wedge-shaped sections being connectingsections adapted to be folded together and to be secured to saidtriangular sections to connect said third wedge-shaped sections and saidtriangular sections in abutting relation,

(1) a handle engaging tab pivotally secured to each of li said secondwedge-shaped sections and being adapted to be secured to said handleflaps,

(m) a sealing flap pivotally secured to each of said third wedge-shapedsections and bein adapted to be secured to said adjacent spout sectionsand said handlle flaps,

(n) a protective lip detachably secured to said spout sections andadapted to be secured to said handle flaps,

(0) said spout sections and said sealing flaps being adapted to define aspout opening for said completed carton.

14. The blank of claim 13 wherein:

(a) said second and third bottom flaps are to be opposite each other inthe carton, and said first and fourth bottom flaps are to be oppositeeach other in the carton,

(b) said second and third bottom flaps being substan tially rectangular,outer flaps adapted to overlap each other to substantially cover thebottom of the carton,

(c) said first and fourth bottom flaps being inner flaps, said firstbottom flap having said middle and said left wall creases as side edges,and said fourth bottom flap having said left Wall crease and the leftside of said blank as said edges,

(a!) said first and fourth bottom flaps each having a References Citedby the Examiner UNITED STATES PATENTS Re. 25,532 3/64 Asman 229-172,810,508 10/57 Braunstein 229-17 X 2,900,124 8/59 Leone 229-522,916,195 12/59 Gatward 229-52 3,147,904 9/ 64 Larson 229-17 5 FRANKLINT. GARRETT, Primary Examiner.

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No.3,175,750 March 30, 1965 Edward L. Bump It is hereby certified thaterror appears in the above numbered patent reqiiring correction and thatthe said Letters Patent should read as correctedbelow.

Column 4, line 46, and column 5, line 23 for "corton",

each occurrence, read carton column 5, line 16, after- "top" insert ofthe line 25, for "thet" read the same column 5, line 60, for"trianguler" read triangular column 9, line 39, for "movable" readmovably column 10, line 6, for "handlle" read handle Signed and sealedthis 17th day of August 1965.

(SEAL) Attest:

'ERNEST w. SWIDER EDWARD J. BRENNER AI testing Officer Commissioner ofPatents

1. A CARTON FOR FLOWABLE MATERIALS COMPRISING: (A) A BOTTOM, (B) AFIRST, A SECOND, A THIRD AND A FOURTH WALL, SAID FIRST AND FOURTH WALLSBEING SUBSTANTIALLY PARALLEL, AND SAID SECOND AND THIRD WALLS BEINGSUBSTANTIALLY PARALLEL, (C) FIRST AND SECOND WEDGE-SHAPED SECTIONSPROJECTING UPWARDLY FROM SAID FIRST AND SECOND WALLS, RESPECTIVELY, (D)A PAIR OF SPOUT SECTIONS PROJECTING FROM SAID WEDGE-SHAPED SECTIONS ANDBEING JOINED TO DEFINE A SPOUT EXTENDING FROM THE CORNER OF SAID CARTONFORMED BY SAID FIRST AND SECOND WALLS, (E) A FIRST FOLDING SECTIONPIVOTALLY CONNECTED TO SAID FIRST WEDGE-SHAPED SECTION AND A SECONDFOLDING SECTION PIVOTALLY CONNECTED TO SAID SECOND WEDGESHAPED SECTION,(F) A FIRST TRIANGULAR SECTION PIVOTALLY CONNECTED TO THE TOP OF SAIDTHIRD WALL AND TO SAID FIRST FOLDING SECTION, AND A SECOND TRIANGULARSECTION PIVOTALLY CONNECTED TO THE TOP OF SAID FOURTH WALL AND TO SAIDSECOND FOLDING SECTON, SAID FIRST AND SECOND TRIANGULAR SECTIONS HAVINGMATING DIAGONAL EDGES, (G) CORRESPONDING HANDLE FLAPS PROJECTING FROMSAID DIAGONAL EDGES OF SAID TRIANGULAR SECTIONS, SAID HANDLE FLAPS BEINGSECURED TO EACH OTHER TO FORM A HANDLE FOR SAID CARTON, (H) SAID HANDLEAND SAID TRIANGULAR SECTIONS HAVING AN UPPER POSITION WHEREIN SAIDFOLDING SECTIONS EXTEND UPWARDLY FROM SAID WEDGE-SHAPED SECTIONS TO OPENSAID SPOUT AND A LOWER POSITION WHEREIN SAID TRIANGULAR SECTIONS COVERTHE TOP OF SAID CARTON AND SAID FOLDING SECTIONS ARE FOLDED DOWNWARDLYAGAINST SAID WEDGE-SHAPED SECTIONS TO SUBSTANTIALLY CLOSE SAID SPOUT.